<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <input type="text" name="" id="input" />

    <script>
      const input = document.getElementById("input");

      input.onkeydown = function (e) {
        if (e.repeat === false) {
          console.log("hello");
        }
        // console.log("repeat", e.repeat);
        // console.log("key", e.key);
        // console.log("code", e.code);
        // console.log("keyCode", e.keyCode);
      };
    </script>
  </body>
</html>
